Quick Answer:
Four 33¢ stamps and
three 15¢ stamps
equals $1.77 in postage. 

Complete Solutions:
Several ways to do the problem:
Solution 1.
Using the hint on
the first page, divide 177 by 33. With five
33¢ stamps, you have $1.65 worth of postage and need
12 more cents. With four 33¢ stamps, you have $1.32
worth of postage and need 45 more cents. Since three 15¢
stamps make 45¢, the solution is four 33¢ and
three 15¢ stamps. 



Solution 2.
Another strategy is to make a table (shown
at left) listing all of the
possible combinations of 33¢ and 15¢
stamps that can be used, without exceeding $1.77. Then
work your way up, adding 15¢ stamps. 

Solution 3.
Make a combination chart, (shown at right)
and fill it out until you either reach or pass $1.77 in
every row and column. The first row has the values of
an increasing number of 33¢ stamps and the first
column the values of increasing the number of 15¢
stamps. Remaining cells are the combinations of the two. 











$.33 
$.66 
$.99 
$1.32 
$1.65 
$1.98 

$.15 







$.30 







$.45 







$.60 







$.75 







$.90 







$1.05 







$1.20 







$1.35 







$1.50 







$1.65 







$1.80 







